> ## Documentation Index > Fetch the complete documentation index at: https://docs.meshqu.com/llms.txt > Use this file to discover all available pages before exploring further. # Verify decision chain (public) > Verifies all decisions in a chain: per-step integrity hash recomputation, chain linkage proof, step continuity, and seal verification if sealed. Public and unauthenticated. ## OpenAPI ````yaml /api/openapi.json get /v1/chains/{chainId}/verify openapi: 3.1.0 info: title: MeshQu API description: >- Governance infrastructure for policy-aware AI decisions. MeshQu does not run tools. It governs decisions about them. version: 1.9.0 contact: name: MeshQu Support email: support@meshqu.com license: name: Proprietary servers: - url: https://api.meshqu.com description: Deployed environment security: - apiKey: [] tenantId: [] tags: - name: Operations description: Health, readiness, metrics, and signing keys - name: Policies description: Policy management - name: Policy Groups description: Policy group management - name: Decisions description: Policy evaluation and recording - name: Chains description: Decision chain verification and sealing - name: Receipts description: Public receipt and bundle retrieval - name: Forms description: Attestation forms and public submission - name: Alerts description: Alert management and webhooks - name: Audit description: Audit log retrieval and verification - name: API Keys description: API key administration - name: Admin description: Tenant and platform administration - name: Dashboard description: Console dashboard data - name: Metrics description: Decision and overview metrics - name: Fields description: Field catalogue - name: Settings description: Tenant settings - name: Rule Creation Logs description: Rule authoring telemetry paths: /v1/chains/{chainId}/verify: get: tags: - Chains summary: Verify decision chain (public) description: >- Verifies all decisions in a chain: per-step integrity hash recomputation, chain linkage proof, step continuity, and seal verification if sealed. Public and unauthenticated. operationId: getV1ChainsByChainIdVerify parameters: - schema: format: uuid type: string in: path name: chainId required: true responses: '200': description: Result of verifying all decisions in a chain content: application/json: schema: description: Result of verifying all decisions in a chain type: object properties: valid: description: >- True if all individual receipts pass integrity verification type: boolean chain_id: format: uuid type: string steps_checked: type: integer receipts_verified: type: integer receipts_failed: type: integer warnings: type: array items: type: object properties: type: anyOf: - type: string enum: - gap - type: string enum: - parent_not_in_chain - type: string enum: - parent_step_not_lower - type: string enum: - chain_id_mismatch - type: string enum: - proof_boundary message: type: string expected_step: type: integer next_found: type: integer required: - type - message sequence: type: array items: type: object properties: step: type: integer decision_id: format: uuid type: string decision: type: string integrity_verified: type: boolean chain_linkage: description: Chain proof verification status anyOf: - type: string enum: - verified - type: string enum: - failed - type: string enum: - not_available required: - step - decision_id - decision - integrity_verified - chain_linkage verified_at: format: date-time type: string chain_sealed: description: Whether the chain has been sealed type: boolean seal: description: Seal verification result (null if not sealed) anyOf: - type: object properties: id: format: uuid type: string steps_count: type: integer seal_hash: type: string seal_verified: type: boolean sealed_at: format: date-time type: string required: - id - steps_count - seal_hash - seal_verified - sealed_at - type: 'null' chain_proof: description: Overall chain cryptographic proof status anyOf: - type: string enum: - full - type: string enum: - partial - type: string enum: - none - type: string enum: - failed required: - valid - chain_id - steps_checked - receipts_verified - receipts_failed - warnings - sequence - verified_at - chain_sealed - seal - chain_proof '404': description: Default Response content: application/json: schema: type: object properties: error: type: object properties: code: description: Error code type: string message: description: Human-readable message type: string details: description: Additional error details required: - code - message correlation_id: description: Request correlation ID type: string required: - error '422': description: Default Response content: application/json: schema: type: object properties: error: type: object properties: code: description: Error code type: string message: description: Human-readable message type: string details: description: Additional error details required: - code - message correlation_id: description: Request correlation ID type: string required: - error security: [] components: securitySchemes: apiKey: type: http scheme: bearer bearerFormat: mqu_ description: >- MeshQu API key passed as a bearer token: `Authorization: Bearer mqu_…`. Mint one in the console (Settings → API keys). tenantId: type: apiKey name: X-MeshQu-Tenant-Id in: header description: >- Tenant UUID for multi-tenant isolation. Required on all authenticated routes — validated before authentication (middleware/tenant.ts), so a missing or non-UUID header returns 400 (MISSING_TENANT_ID / INVALID_TENANT_ID) before the API key is checked. ````